Hamilton Watches

Its first series of pocketwatches, the Broadway Limited, was known as the "Watch of Railroad Accuracy," and Hamilton became popular by making accurate railroad watches. Hamilton introduced its first wristwatch in 1917. This watch was designed to appeal to men entering World War I and contained the 0-sized 17-jewel 983 movement originally designed for women's pendent watches. The introduction of the 0-sized wristwatch was the start of a line of wristwatches that included some of the finest American wristwatches made. In 1928 Hamilton purchased the Illinois Watch Company. Some of the most collectable early Hamilton wristwatches include: The Oval, The Tonneau, The Rectangular, The Square Enamel, The Coronado, The Piping Rock, The Spur, The Glendale, The Pinehurst, The Langley, The Byrd, The Cambridge, and The Flintridge. Many models came in solid gold and gold filled cases.

Source: Wikipedia